How to enable Mautic to use VERP for bounce mails?

Hi there! We are using Mautic 3.2.5 and tried to enable bounce-handling in it. I read a tutorial from this guy How does email bounce work in mautic wich explains how it should be done.
He does not point out how to get Mautic to add return-path in a VERP style format. Our email currently only contains the bounce-address specified in the EMail-settings.
Is it up to Mautic to put those extra information or is it meant for the transportation mailserver to add it?